In the living room, an antique Italian mirror hangs above the slipcovered Vervoordt sofa, and a bronze Thai Buddha torso is displayed on a sculptor’s pedestal. The armchair at right is Louis XIII.

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The living room’s 18th-century French table showcases rare finds, including, at left, an antique pietra ollare bowl and a Han-dynasty bronze vase.

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At one end of the living room is an antique Italian painted cabinet filled with glassware; a silk curtain masks the Dolby home-theater system.

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A kitchen cabinet is made of reclaimed 17th-century wood.

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For Katia’s bedroom, on a mezzanine, Vervoordt designed the railing from antique metal rods once used as roof supports at the Louvre.

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Katia’s bath features a Roman marble tub.

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The mirror that surmounts Katia’s sink is 18th-century Italian, as is the polychrome stool.

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Silk taffeta skirts a 19th-century marble basin in Marielle’s bath.

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Marielle’s bedroom walls are decorated with 18th-century painted panels, while the coffered ceiling, original to the space, is whitewashed. Above a painted secretary hangs a Baroque Italian gilded mirror; the Savonarola chair dates from the 17th century.

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The Labèques sit at Steinway grand pianos in their Rome recording studio, which occupies a 1920s former school building and was renovated by architect Serena Mignatti.

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In the rehearsal room, a sofa and cocktail table, both Vervoordt designs, are joined by Montagnard stools.